水稻籼粳交杂种优势的研究 Ⅱ.主要生理性状及产量性状的杂种优势分析

Studies on the Heterosis of Hybridization between Indica and Japonica Rice Ⅱ.The Heterosis of Main Physiology Characters and Economic Characters

对籼粳稻杂交F1代的主要生理和产量性状的杂种优势及正反交差异表现进行分析。研究结果表明 :不同杂交组合F1代的杂种优势表现不同 ,有的性状呈正向优势 ,有的性状呈负向优势 ;不同性状间正反交差异表现不同 ,有的性状正反交差异达到显著水平 ,有的性状正反交差异不显著。在育种实践中要根据不同品种各个性状间F1代杂种优势表现进行合理利用。

In this study,the heterosis and difference between positive hybridity and reciprocals hybridity of main physiology characters and economic characters were discussed.The results were:the heterosis of hybridization between different varieties was different,some characters were positive superiority,some were negative superiority.The difference between positive hybridity and reciprocals hybridity of different characters was different,some were obvious and some were not obvious.The heterosis was properly used according to the different varieties and hybridization tape in the breeding.